# -*- coding: utf-8 -*-#
#-------------------------------------------------------------------------------
# 建立者:        潘炎珍  
# Name:         demo06
# Description:
# Author:       98745
# Date:         2019/3/11
#-------------------------------------------------------------------------------

from numpy import *
a=arange(12).reshape(3,4)
b=arange(16).reshape(4,4)
c=arange(20).reshape(5,4)
print(a)
print('----------------')
print(b)
print('------------')
print(c)
print('-------------')
print(vstack((a,b,c)))